Improve eject endpoint to return fully functional application

[pPrecel]

Description

Changes proposed in this pull request:

• fix deployment selector (build deploy with same pod labels and pod selector)
• build buildless-controller image with runtime files
• merge function and runtime package.jsons into one
• return runtime files in response

Command result:

Generated workspace can be run locally using make:

Or deployed on the k3d cluster:

Related issue(s)

• Generate function source files based on given Node.js function #1838 (comment)